Furnace



(No Model.) 2 SheetsSheet 1 A. I. HOVLAN-D.

FURNACE.

No. 480,769. Patented Aug. 16, 1892.

UNI-TED STATES PATENT OFFICE.

ANTON I. HOVLAND, or FARIBAUL'I, MINNESOTA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 480,7 69, dated August16, 1892.

Application filed November 2'7, 1891. Serial No. 413,356. (No model.)

To all whom it may concern.-

Be it known that I, ANTON I. HOVLAND, of Faribault, in the county ofRice and State of Minnesota, have invented certain Improvements inFurnaces, of which the following is a specification.

My invention relates to means for utilizing the heat of the smoke as itpasses off from the furnace and for profitably consuming such heat invarious uses.

To this end my invention consists in the combination, With a boiler orother furnace, of a duct leading down around the steam-engine and thesteam-supply pipe therefor, a ductfor the smoke and heat arrangedbeneath or at the floor-line, feed-water coils arranged therein, wherebythe feed-water for the boiler is heated,and an air-heating radiatorarranged at the floor-line and provided with transverse flues throughwhich the smoke and heated gases pass into the smoke-flue, an air-inletand an outlet into the furnace being provided for said radiator, all ashereinafter described, and particularly pointed out in the claims.

My invention will be more readily understood by reference to theaccompanying drawings, in which- Figure 1 is a front elevation of aboiler-furnace and an engine and apparatus embodying my inventioncombined therewith, portions of the same being represented in section,as seen on the line was of Fig. 2. Fig. 2 is a plan View thereof on theline y y of Fig. 1. Fig. 3 is a longitudinal vertical section on theline 2: z of Fig. 2, showing, also, means for supplying air to theradiator.

As shown in the drawings, the boiler 2 is incased in the usual walls andcovering 3. The doors 4 and 5 of the front cover the openings into thefire-pot 6 and the ash-pit 7, Fig. 3.

8 represents the chimney or smoke-stack, which extends down below thefloor of the furnace-room, as shown. From the smokebox 9 on the front ofthe furnace a direct duct 10 leads into the upper part of the chimney,so that while a fire is being started a straight draft may be had. Afterthe fire is properly started the damper 11 is closed, as shown. From theouter side of the smoke-box the pipe 13 leads directly into the suctionand blastfan case 14., from whence the hot air and smoke are dischargedthrough the pipe 15,

which opens into the pipe 16, extending from the steam-dome 17 andsurrounding the livesteam pipe 18, which leads to the engine steam chestand cylinder 19. The pipe 16 extends down to and opens into thecylinder-casing 20, arranged about the engine-cylinder. In this way itwill be seen that the steam-pipe is kept very hot and loss of pressuretherein, owing to radiation of heat, prevented. The same is true of thesteam-chest and cylinder of the engine. From the jacket 20 the smoke andhot gases pass into the chamber 21, arranged beneath the fioor 22 of thefurnaceroom. The feedwater pipes arranged in coils 23 are disposed inthis chamber 21 andthe feed-water passing through them is heated toquite a high temperature before passing into the boiler. From thischamber the hot gases pass through the fines 24:, extending between thetight end pieces or heads 25, shutting off this part of the duct beneaththe floor from the other parts. From the lines 24 the smoke isdischarged through the pipe or duct 26 into the bottom of the smoke-flue8.

In connection with the radiator and extending from the opening 23therein I provide the duct 31, which leads out into a remote part of theboiler-room, preferably. The end of the duct is closed by the grating32, arranged in the raised curd 33, which prevents the sweeping of dirtinto the duct. This grating is of the register style, so that the supplyof air to the radiator may be cut off at this point or accuratelyregulated, as rendered necessary by the requirements of the fire.Passing into the radiator the air passes among the fiues 24, beingheated to a high point thereby, and thence flowing upward through theduct or exhaust 29, extending into the ash-pit of the furnace. by a doorwhen the ashes are being drawn. The advantage of this construction andof the close location of the air-radiator to the furnace is that a veryhot draft passing up through the coal on the grate is provided, andsupplying the oxygen at a very high temperature a much more completecombustion of the products is attained. It will thus be seen that inseveral Ways I accomplish a great saving of fuel, it being a fact thatafter passing through the various parts of my apparatus the smokedischarged from the chimney is The top of this fiue 29 is closed' barelyperceptible, the greater portion thereof after the starting of the firebeing originally consumed in the furnace.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. The combination of the furnace, with thesmoke-chimney, the furnace-room floor, said chimney extending to a pointbeneath the same, the ash-pit and fire-box of said furnace, a boxarranged beneath said floor, a duct leading from one side of said boxinto said ashbox, a fresh air-d uct leading into the opposite side ofsaid box, a chamber arranged ateach end of said box, horizontal flues24, passing from chamber to chamber and through said box, a smoke-pipeleading from the top of the furnace down to the chamber, surrounding oneend of said box, a duct leading from the chamber at the other end to thebase of said chimney, and a direct connection 10, having a damper 11,all substantially as described, and for the purpose set forth.

2. The combination, with the furnace and boiler, of the smoke-flue, thesmoke-pipe, one of said smoke-pipes surrounding the livesteam pipe, theengine, a jacket about the same, a feed-water coil, a chamber for thesame, a connection therefrom to the smokefiue, and means for injectingthe Water from said coil into the boiler, as and for the purposespecified.

3. The combination, with the furnace and the boiler, of asmoke-fiue, asmoke-box of said boiler, a direct connection therefrom to thesmoke-flue, the engine, the steam-dome of the boiler, the steam-pipeextending therefrom to said engine, a smoke-pipe inclosing saidsteam-pipe, a jacket about said cylinder of said engine and connected tosaid smokepipe, a suction-pan within said smoke box and pipe, afeed-water coil, a containing-chamber therefor, a radiator, longitudinalflues therein for the passage of the smoke into the lower end of thechimney, openings into said radiator for the air, and an openin;therefrom into the ash-pit of the furnace, said radiator and feed-Waterchamber being arranged belowthe grate-line of the furnace.

4t. The combination, with the furnace, of the air-radiator havinghorizontal fines 24 and arranged immediately in front of the furnace andbeneath the floor, the air-duct 31 to lead the air into the same, araised valvegrating covering the mouth of the said duct, whereby thesupply of air may be regulated, and a smoke-pipe passing into a chambersurrounding the end of the radiator, the smoke passing thence th roughthe fines 24 and thence to the smoke-stack, substantially as described.

In testimony whereof I have hereunto set my hand this 3d day ofNovember, 1891.

ANTON I. HOVLAND. In presence of C. G. HAWLEY, F. S. LYON.

